Swarovski BTX 30x/35x Eyepiece Module for ATX/STX Spotting Scopes

Swarovski BTX 30x/35x Eyepiece Module for ATX/STX Spotting Scopes

Swarovski BTX 30x/35x Eyepiece Module for ATX/STX Spotting Scopes

B&H # SWBTXEM MFR # 49903
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Product Highlights

  • View with Both Eyes Open
  • 45° Angled Viewing
  • 35x with 95mm Models
  • 30x with 65mm/85mm Models
  • 63° Wide Apparent Angle of View
  • SWAROVISION and SWAROCLEAN Systems
  • Nitrogen-Filled, Water and Fogproof
  • Removable and Adjustable Forehead Rest
  • Twist-Up Rubber Eyecups
  • Integrated Aiming Aid with Reticle
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  • 1Description

Fully compatible with all versions of their ATX and STX spotting scope systems, Swarovski Optik's BTX 30x/35x Eyepiece Module represents the pinnacle of comfort for long-duration glassing sessions. The innovative design replaces the conventional single eyepiece with a dual-eyepiece binocular configuration that enables users to view with both eyes open, and with the eyepieces set at a 45° angle to the optical tube, their head is put in a natural viewing position. When mounted on the 65mm and 85mm models it has a 30x magnification, whereas the 95mm version is stepped up to 35x. Both models have a 63° wide apparent angle of view. To match the performance of the objective modules, this eyepiece module has the SWAROVISION system to improve color fidelity, contrast, and clarity; and SWAROCLEAN coatings help keep the lenses clear and easy to clean.

To improve stability and maintain the optimal head position relative to the eyepieces is an adjustable forehead rest. The rest can be removed if users find it more comfortable to use without it. Like the rest of the modules in the ATX/STX family, the Eyepiece module is nitrogen-filled to make it resistant to internal fogging when moving through extreme temperature changes, and is also O-ring sealed to be waterproof and submersible. Because finding targets through angled eyepieces is sometimes challenging, Swarovski provides an innovative aiming aid. The unmagnified device is placed in front of and to the side of the right eyepiece and is zeroed to the optical tube, so users simply look through the sight hole and center their subject in the reticle. Like the forehead rest, the aiming aid can be removed if users prefer to use the integrated sight on the objective modules shade.

Optical Performance
  • Dual identical eyepieces
  • 65/85mm Objective: 30x magnification with 65mm/85mm objective models; 35x magnification with 95mm model
  • Proprietary SWAROVISION system improves image contrast, color, and clarity
  • Wide Apparent Angle of View: 63° 
  • Field of View at 1000 Yards: 114' (65mm) / 111' (85mm) / 96' (95mm)
  • Exit Pupil: 2.2mm (65mm) / 2.9mm (85mm) / 2.7mm (95mm)
  • Long, 21mm eye relief on all models
SWAROVISION System
  • High-definition (HD) fluoride glass lenses eliminate chromatic aberrations for accurate color fidelity, and improved resolution and contrast
  • Field-flattener lenses correct spherical aberrations for distortion-free views, especially at the edges
  • SWAROTOP anti-reflective multi-coating that enhances light transmission
  • SWARODUR coatings provide enhanced scratch resistance
  • Non-stick SWAROCLEAN coatings on exposed lens surfaces ensure that water, dirt, sap, and oil can be easily removed without scratching or leaving residue
Use and Handling
  • Provides comfortable both-eyes-open viewing, with reduced, fatigue during long-duration observation sessions
  • Eyepieces set at 45° angle to optical tube for comfortable viewing while sitting, standing, or lying prone
  • Forehead rest improves viewing stability, is adjustable for optimal eye relief and viewing comfort, and is removable if preferred
  • Innovative aiming aid utilizes an unmagnified view with a sunburst-type reticle to find subjects faster and easier than using the angled eyepieces
  • 56-72mm interpupillary adjustment range
  • ±4 right-eye dioptric correction
  • Multi-position twist-up rubber eyecups offer comfortable use with or without eyewear
  • Simple bayonet mount for fast installation and removal
Construction Details
  • Nitrogen-filled and O-ring sealed to be water and fogproof
  • Submersible to 13.1' (4.0m)
  • Operating temperature: -13 to 131°F (-25 to 55°C)
  • Tethered one-piece ocular rainguard
  • Weight: 3.1 pounds
UPC: 708026499036
In the Box
Swarovski BTX 30x/35x Eyepiece Module for ATX/STX Spotting Scopes
  • Mount Cap
  • One-Piece Eyepiece Cap
  • Limited Lifetime Warranty
  • Table of Contents
    • 1Description
    Magnification 65mm Objective: 30x
    85mm Objective: 30x
    95mm Objective: 35x
    Angle of View 65mm Objective: 2.1°, actual
    85mm Objective: 2.1°, actual
    96mm Objective: 1.8°, actual
    Field of View 65mm Objective: 114' @ 1000 yd / 38 m @ 1000 m
    85mm Objective: 111' @ 1000 yd / 37 m @ 1000 m
    95mm Objective: 96' @ 1000 yd / 32 m @ 1000 m
    Exit Pupil 65mm Objective: 2.2 mm
    85mm Objective: 2.9 mm
    95mm Objective: 2.7 mm
    Eye Relief 21.0 mm
    Close Focus Distance 65mm Objective: 7.2' / 2.2 m
    85mm Objective: 12.5' / 3.8 m
    95mm Objective: 16.4' / 5.0 m
    Dioptric Correction ±4
    Interpupillary Adjustment 56.0 - 72.0 mm / 2.2 - 2.8"
    Weatherproofing Nitrogen-filled
    Submersible to 13.1' / 4.0 m
    Fogproof
    Operating Temperature -13 to +131°F (-25 to +55°C)
    Length 6.9" / 17.4 cm
    Weight 3.1 lb / 1.4 kg
    Packaging Info
    Package Weight 5.4 lb
    Box Dimensions (LxWxH) 11.2 x 8.0 x 5.3"
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